The invention relates to a power steering assembly for a hydraulic power steering system of motor vehicles, comprising at least one hydraulic servo valve with a control member (3) for controlling the steering assistance in accordance with a relative rotation of an input shaft with respect to an output shaft (2), and at least one actuator (9) for the relative adjustment of the control member (3) with respect to the input shaft or output shaft (2) in order to influence the steering assistance characteristic. Further, the power steering assembly comprises a summation gearing having a first rotatable drive member (4) that is in operative engagement with the control member (3), and a second rotatable drive member (5) that is in operative engagement with an output element (8) of the actuator (9), and an output member (6). The summation gearing superposes a rotation of the first drive member (4) with a rotation of the second drive member (5) and drives, via the output member (6), an epicyclic gearing with at least one planetary gear (11), which is in operative engagement together with both the input shaft or output shaft (2) and with the control member (3) and can be rotated both about a planetary axis (14) fixed with respect to the frame and about its own axis of rotation (12) orbiting about the planetary axis (14), in such a way that a rotation of the first drive member (4) causes a rotation of the own axis of rotation (12) of the planetary gear (11) orbiting about the planetary axis (14) in such a way that no rotation of the planetary gear (11) about its own axis of rotation (12) occurs as a consequence, but a rotation of the second drive member (5) causes a rotation of the planetary gear (11) about its own axis of rotation (12), wherein the rotation of the planetary gear (11) about its own axis of rotation (12) causes a relative rotation of the input shaft or output shaft (2) with respect to the control member (3).
POWER STEERING ASSEMBLY COMPRISING STEERING TORQUE OVERLAY
2018-08-23
Patent
Electronic Resource
English